How do maternal emotion and sleep conditions affect infant sleep: a prospective cohort study

Understanding of perinatal mental health and its psychosocial determinants through Ukrainian women's experience

INTRODUCTION

Perinatal mental health defines new mothers, their families, and the social, emotional, and cognitive development of their children. The factors contributing to Ukrainian mothers' mental health are not well-defined in the literature. This study aims to explore how Ukrainian women understand mental health and its psychosocial determinants through their perinatal experience.

METHODS

This qualitative analysis is part of a larger mixed-methods study exploring perinatal mental health in Ukraine. Five online focus groups (n=30) with Ukrainian mothers of children aged 0-5 years were conducted in June-July 2020. The participants were selected from a pool of 1634 women who completed an online questionnaire and agreed to participate in further research. Informed consent was obtained. The data collected from the focus groups were transcribed verbatim and analyzed thematically using Dedoose software.

RESULTS

The study identified two themes. The first theme was: 'Understanding perinatal mental health through women's experience', which covers five subthemes. The second theme was 'Psychosocial determinants of maternal mental health', which includes six subthemes. Overall, women's feelings of guilt, blame, and shame during their perinatal journey are influenced by socio-cultural factors and can lead to mental health problems and reluctance to seek proper help.

CONCLUSIONS

The study has identified some factors that can contribute to the enhancement of mental health and well-being of mothers in Ukraine during their perinatal journey. Negative emotions such as guilt, blame, and shame can have a significant impact on their ability to seek the necessary support, and should be addressed by midwives and other healthcare professionals.

Early-to-mid pregnancy sleep and circadian markers in relation to birth outcomes: An epigenetics pilot study

Maternal sleep and circadian health during pregnancy are emerging as important predictors of pregnancy outcomes, but examination of potential epigenetic mechanisms is rare. We investigated links between maternal leukocyte DNA methylation of circadian genes and birth outcomes within a pregnancy cohort. Women (n = 96) completed a questionnaire and provided a blood sample at least once during early-to-mid pregnancy (average gestation weeks = 14.2). Leukocyte DNA was isolated and DNA methylation (average percent of methylation) at multiple CpG sites within BMAL1, PER1, and MTNR1B genes were quantified by pyrosequencing. Birth outcomes including gestational age at delivery, birthweight, and head circumference were abstracted from medical charts. Linear regression analyses were run between each CpG site with birth outcomes, adjusting for important confounders. Sleep duration and timing were assessed as secondary exposures. Higher methylation of a CpG site in PER1 was associated with smaller log-transformed head circumference (β=-0.02 with 95% CI -0.02 to 0.01; P, trend = 0.04). Higher methylation of MTNR1B (averaged across sites) was associated with lower log-transformed birthweight (-0.08 with 95% CI -0.16 to -0.01; P, trend = 0.0495). In addition, longer sleep duration was associated with higher birthweight (0.10 with 95% CI 0.02 to 0.18 comparing > 9 h to < 8 h; P, trend = 0.04). This pilot investigation revealed that higher methylation of PER1 and MTNR1B genes, and sleep duration measured in early-to-mid pregnancy were related to birth outcomes.

Methylation of melatonin receptors in patients with unipolar and bipolar depression

Disturbances of melatonin secretion alter the circadian rhythm and sleep-wake cycle, which is observed among patients with depression. Melatonin acts via melatonin receptors MT1 and MT2, which are present in many tissues, including peripheral blood mononuclear cells (PBMC). We assume that disturbances of the melatonin pathway in the brain may be reflected by molecular changes in peripheral organs. The study objective was to evaluate the methylation profile of CpG island in the promoter region of melatonin receptor genes MTNR1A and MTNR1B in PBMC of patients with depression and compare it with healthy volunteers. The study group comprised 85 patients with unipolar (UP) and bipolar disorders (BP) and 83 controls. The methylation pattern of CpG island in the promoter region was analyzed using the quantitative methylation-specific real-time PCR (qMSP-PCR) method. We found that the methylation profile of the patients with depression varied in comparison to the control group. The methylation level of MTNR1A was significantly lower among depressed patients compared to controls. Additionally, melatonin concentration was negatively correlated with MTNR1B methylation level among the UP patients. The study may suggest that the methylation profile of melatonin receptors in PBMC may be used as a complementary molecular marker in depression diagnosis.